A line has a slope of $-\frac{3}{7},$ and its $y$-intercept is $(0,18)$. What is its $x$-intercept?

Steps:

1) Find the equation of the straight line first

2) Substitute y = 0 into the equation, solve for x.

3) The answer is the x-intercept.

https://web2.0calc.com/questions/help-please_67220#r2